The feasibility of 1-Tbit/s transoceanic systems based on in-line optical r
egeneration of 40-Gbit/s channels is numerically investigated. The roles of
fiber dispersion, fiber mode area, and channel and regenerator spacings ar
e analyzed, and the corresponding operating ranges for error-free transmiss
ion are determined. The results represent a first step in designing multi-t
erabit-pcr-second global transmission systems based on realistic components
and parameters. (C) 1999 Optical Society of America.